Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:16:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vec[node].size();++i) ^ user.cpp: In function ‘void prelucrare()’: user.cpp:39:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<dfs1[i].size()&&!ok;++k) ^ user.cpp: In function ‘void afisare()’: user.cpp:57:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<noway.size();++i) ^ user.cpp: In function ‘void citire()’: user.cpp:22:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d ",&n,&m,&p); ^ user.cpp:25:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&i,&j); ^ user.cpp:30:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d ",&bere[k]); ^